AD8055/AD8056 Low Cost, 300 MHz Voltage Feedback ...

1 Low Cost, 300 MHz Voltage Feedback Amplifiers AD8055/AD8056 . FEATURES CONNECTION DIAGRAMS. Low cost single (AD8055) and dual (AD8056). NC 1 8 NC. Easy-to-use Voltage Feedback architecture VOUT 1 5 +VS. IN 2 7 +VS. high speed VS 2. +IN 3 6 VOUT. 300 MHz, 3 dB bandwidth (G = +1). +IN. 01063-002. 3 4 IN. 1400 V/ s slew rate VS 4 AD8055 5 NC. AD8055. 01063-001. 20 ns settling to NC = NO CONNECT. Low distortion: 72 dBc @ 10 MHz Figure 1. N-8 and R-8 Figure 2. RJ-5. Low noise: 6 nV/ Hz Low dc errors: 5 mV max VOS, A max IB OUT1 1 8 +VS. Small packaging IN1 2 7 OUT. AD8055 available in 5-lead SOT-23 +IN1 3 6 IN2. 01063-003. AD8056 available in 8-lead MSOP VS 4. AD8056 5 +IN2. Excellent video specifications (RL = 150 , G = +2). Figure 3. N-8, R-8, and RM-8. Gain flatness dB to 40 MHz differential gain error Their dB flatness out to 40 MHz, wide bandwidth out to differential phase error 300 MHz, along with 1400 V/ s slew rate and 20 ns settling Drives 4 video loads ( V) with differential time, make them useful for a variety of high speed applications.

2 Gain and differential phase Low power, 5 V supplies 5 mA typ/amplifier power The AD8055 and AD8056 require only 5 mA typ/amplifier of supply current supply current and operate on a dual 5 V or a single +12 V. high output drive current: over 60 mA power supply, while capable of delivering over 60 mA of load current. The AD8055 is available in a small 8-lead PDIP, an 8-lead APPLICATIONS SOIC, and a 5-lead SOT-23, while the AD8056 is available in an 8-lead MSOP. These features make the AD8055/AD8056 ideal Imaging for portable and battery-powered applications where size and Photodiode preamps power are critical. These amplifiers in the R-8, N-8, and RM-8. Video line drivers packages are available in the extended temperature range of Differential line drivers 40 C to +125 C. Professional cameras Video switchers 5. RC VOUT = 100mV p-p Special effects 4 RL = 100 . VIN VOUT. A-to-D drivers 3 50 . G = +1. Active filters 2 RF RF = 0.

3 RG RL RC = 100 . 1 G = +2. GAIN (dB). RF = 402 . GENERAL DESCRIPTION 0. The AD8055 (single) and AD8056 (dual) Voltage Feedback 1. amplifiers offer bandwidth and slew rate typically found in 2. G = +10. current Feedback amplifiers. Additionally, these amplifiers are 3. RF = 909 . easy to use and available at a very low cost. G = +5. 4 RF = 1000 . Despite their low cost, the AD8055 and AD8056 provide 5. 01063-004. 1M 10M 100M 1G. excellent overall performance. For video applications, their FREQUENCY (Hz). differential gain and phase error are and into a Figure 4. Frequency Response 150 load and and while driving four video loads ( ). Rev. J. Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice.

4 No One Technology Way, Box 9106, Norwood, MA 02062-9106, license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Tel: Trademarks and registered trademarks are the property of their respective owners. Fax: 2006 Analog Devices, Inc. All rights reserved. AD8055/AD8056 . TABLE OF CONTENTS. Features .. 1 12. 1 Four-Line Video 12. General Description .. 1 Single-Ended-to-Differential Line 12. Connection 1 Low Noise, Low Power 12. Revision History .. 2 Power Dissipation Limits .. 13. 3 Resistor Selection .. 13. Absolute Maximum 5 Driving Capacitive 13. Maximum Power Dissipation .. 5 Outline Dimensions .. 14. ESD 5 Ordering Guide .. 16. Typical Performance Characteristics .. 6. Test 11. REVISION HISTORY. 2/06 Rev. I to Rev. J 10/02 Rev. E to Rev. F. Changes to Format ..Universal Text Changes to Reflect Extended Temperature Range for Updated Outline Dimensions .. 15 R-8, N-8 Changes to Ordering Guide.

5 16 Changes to Changes to Absolute Maximum Figure 2 Replaced ..3. 2/04 Rev. H to Rev. I Changes to Ordering Guide ..3. Changes to 1 Outline Dimensions 11. Changes to Ordering Guide .. 3. 7/01 Rev. D to Rev. E. 6/03 Rev. G to Rev. H TPC 24 Replaced with New Graph ..7. Changes to Absolute Maximum Ratings .. 3. Updated Ordering 3 3/01 Rev. C to Rev. D. Updated Outline Dimensions .. 11 Edit to Curve in TPC 23 ..7. 2/03 Rev. F to Rev. G 2/01 Rev. B to Rev. C. Changes to Product Description .. 1 Edits to Text at Top of Specifications Page (65 to 5)..2. Changes to Specifications .. 2. Change to Ordering 3. Outline Dimensions Updated .. 11. Rev. J | Page 2 of 16. AD8055/AD8056 . SPECIFICATIONS. TA = 25 C, VS = 5 V, RF = 402 , RL = 100 , Gain = +2, unless otherwise noted. Table 1. AD8055A/AD8056A. Parameter Conditions Min Typ Max Unit DYNAMIC PERFORMANCE. 3 dB Bandwidth G = +1, VO = V p-p 220 300 MHz G=+1, VO = 2 V p-p 125 150 MHz G=+2, VO = V p-p 120 160 MHz G=+2, VO = 2 V p-p 125 150 MHz Bandwidth for dB Flatness VO = 100 mV p-p 25 40 MHz Slew Rate G = +1, VO = 4 V step 1000 1400 V/ s G = +2, VO = 4 V step 750 840 V/ s Settling Time to G = +2, VO = 2 V step 20 ns Rise and Fall Time, 10% to 90% G = +1, VO = V step 2 ns G = +1, VO = 4 V step ns G = +2, VO = V step ns G = +2, VO = 4 V step 4 ns NOISE/HARMONIC PERFORMANCE.

6 Total Harmonic Distortion fC = 10 MHz, VO = 2 V p-p, RL = 1 k 72 dBc fC = 20 MHz, VO = 2 V p-p, RL = 1 k 57 dBc Crosstalk, Output-to-Output (AD8056) f = 5 MHz, G = +2 60 dB. Input Voltage Noise f = 100 kHz 6 nV/ Hz Input Current Noise f = 100 kHz 1 pA/ Hz Differential Gain Error NTSC, G = +2, RL = 150 %. NTSC, G = +2, RL = %. Differential Phase Error NTSC, G = +2, RL = 150 Degree NTSC, G = +2, RL = Degree DC PERFORMANCE. Input Offset Voltage 3 5 mV. TMIN to TMAX 10 mV. Offset Drift 6 V/ C. Input Bias Current A. TMIN to TMAX 1 A. Open-Loop Gain VO = V 66 71 dB. TMIN to TMAX 64 dB. INPUT CHARACTERISTICS. Input Resistance 10 M . Input Capacitance 2 pF. Input Common-Mode Voltage Range V. Common-Mode Rejection Ratio VCM = V 82 dB. OUTPUT CHARACTERISTICS. Output Voltage Swing RL = 150 V. Output Current 1 VO = V 55 60 mA. Short-Circuit Current1 110 mA. Rev. J | Page 3 of 16. AD8055/AD8056 . AD8055A/AD8056A. Parameter Conditions Min Typ Max Unit POWER SUPPLY.

7 Operating Range V. Quiescent Current AD8055 mA. TMIN to 125 C mA. TMIN to 85 C mA. AD8056 10 12 mA. TMIN to 125 C mA. TMIN to 85 C mA. Power Supply Rejection Ratio +VS = +5 V to +6 V, VS = 5 V 66 72 dB. VS = 5 V to 6 V, +VS = +5 V 69 86 dB. OPERATING TEMPERATURE RANGE AD8055 ART 40 +85 C. AD8055AR, AD8055AN, AD8056AR, AD8056AN, AD8056 ARM 40 +125 C. 1. Output current is limited by the maximum power dissipation in the package. See Figure 5. Rev. J | Page 4 of 16. AD8055/AD8056 . ABSOLUTE MAXIMUM RATINGS. Table 2. MAXIMUM POWER DISSIPATION. Parameter Ratings The maximum power that can be safely dissipated by the Supply Voltage V. AD8055/AD8056 is limited by the associated rise in junction Input Voltage (Common Mode) VS. temperature. The maximum safe junction temperature for Differential Input Voltage V. plastic encapsulated devices is determined by the glass Output Short-Circuit Duration Observe Power Derating Curves transition temperature of the plastic, approximately 150 C.

8 Storage Temperature Range N, R 65 C to +150 C Exceeding this limit temporarily can cause a shift in parametric Operating Temperature Range (A Grade) 40 C to +125 C performance due to a change in the stresses exerted on the die Lead Temperature (Soldering 10 sec) 300 C by the package. Exceeding a junction temperature of 175 C for an extended period can result in device failure. Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress While the AD8055/AD8056 are internally short-circuit rating only; functional operation of the device at these or any protected, this may not be sufficient to guarantee that the other conditions above those indicated in the operational maximum junction temperature (150 C) is not exceeded under section of this specification is not implied. Exposure to absolute all conditions. To ensure proper operation, it is necessary to maximum rating conditions for extended periods may affect observe the maximum power derating curves.

9 Device reliability. MAXIMUM POWER DISSIPATION (W). PDIP-8. SOIC-8. MSOP-8. SOT-23-5. 0. 01063-005. 55 45 35 25 15 5 5 15 25 35 45 55 65 75 85 95 105 115 125. AMBIENT TEMPERATURE ( C). Figure 5. Plot of Maximum Power Dissipation vs. Temperature for AD8055/AD8056 . ESD CAUTION. ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although this product features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality. Rev. J | Page 5 of 16. AD8055/AD8056 . TYPICAL PERFORMANCE CHARACTERISTICS. 0V 0V. 01063-007. 01063-011. 20mV 5ns 1V 5ns Figure 6. Small Step Response, G = +1 (See Figure 34) Figure 9. Large Step Response, G = 1 (See Figure 35).

10 5. RC VOUT = 100mV p-p 4 RL = 100 . VIN VOUT. 3 50 . G = +1. 2 RF RF = 0 . RG RL RC = 100 . 1 G = +2. GAIN (dB). RF = 402 . 0V 0. 1. 2. G = +10. RF = 909 . 3. G = +5. 01063-008. 1V 5ns 4 RF = 1000 . 5. 01063-012. 1M 10M 100M 1G. FREQUENCY (Hz). Figure 7. Large Step Response, G = +1 (See Figure 34) Figure 10. Small Signal Frequency Response, G = +1, G = +2, G = +5, G = +10. 5. VOUT = 2V p-p 4 RL = 100 . 3. 2. 1 G = +1. GAIN (dB). RF = 0 . 0V. 0. G = +2. 1 RF = 402 . 2. G = +10. RF = 909 . 3. 01063-010. 20mV 5ns 4 G = +5. RF = 1000 . 5. 01063-013. 1M 10M 100M 1G. FREQUENCY (Hz). Figure 8. Small Step Response, G = 1 (See Figure 35) Figure 11. Large Signal Frequency Response, G = +1, G = +2, G = +5, G = +10. Rev. J | Page 6 of 16. AD8055/AD8056 . 40. VOUT = 100mV. G = +2. RL = 100 G = +2. RF = 402 50 RL = 1k . DISTORTION (dBc). OUTPUT (dB). 60. 0. SECOND. 70. THIRD. 80. 90. 01063-014. 01063-017. 1M 10M 100M 1G 0 FREQUENCY (Hz) VOUT (V p-p).